"can only concatenate tuple"?

[buran]

first of all, read this https://python-forum.io/Thread-Basic-Nev...n-sequence
it also apply to your use of while loop

there are at least three ways to do it

• use a list, so that you can append numbers, then convert it to tuple
  
• use tuple comprehension
  
• use slicing to create/return copy of the tuple with desired numbers in it